PHMSA issued this final rule in response to industry petitions to reduce regulatory burdens for cylinder requalification requirements.  To ensure safety during use, Hazardous Materials Regulations (HMR) require the periodic testing of DOT-specification cylinders through certain non-destructive testing methods to verify integrity. The final rule amends the timeframe previously required by the HMR to requalify certain commonly used cylinders.  The final rule also provides regulatory relief, as well as reduced requalification costs for propane marketers, distributors, and others in the non-corrosive gas service without reducing safety.

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